Layer context menu: load and save styles (#10777)

Author: DelazJ

docs/user_manual/introduction/general_tools.rst

@@ -267,6 +267,8 @@ Some of these entries are not available when multiple selections are made
   :menuselection:`--> Paste Style`                                  |checkbox|    |checkbox|      |checkbox|      |checkbox|    |checkbox|
   :menuselection:`--> Add...`                                                     |checkbox|      |checkbox|      |checkbox|    |checkbox|           |checkbox|
   :menuselection:`--> Rename Current...`                                          |checkbox|      |checkbox|      |checkbox|    |checkbox|           |checkbox|
+  :menuselection:`--> Load Style`                                   |checkbox|    |checkbox|      |checkbox|      |checkbox|    |checkbox|           |checkbox|
+  :menuselection:`--> Save Style`                                                 |checkbox|      |checkbox|      |checkbox|    |checkbox|           |checkbox|
   :menuselection:`--> Edit symbol...`                                             |checkbox|
   :menuselection:`--> Copy Symbol`                                                |checkbox|
   :menuselection:`--> Paste Symbol`                                               |checkbox|
@@ -429,16 +431,17 @@ Editing layer style
 
 From the :guilabel:`Layers` panel, you have shortcuts to change the layer rendering quickly and easily.
 
-Right-click on a layer and select :menuselection:`Styles -->` in the list in order to:
+Right-click on a layer and select :menuselection:`Styles -->`.
+See :ref:`manage_styles_from_layer_context_menu`
+for the list of available actions to manage layer styles.
 
-* see the :ref:`styles <manage_custom_style>` currently available for the layer.
-  If you defined many styles for the layer, you can switch from one to another
-  and your layer rendering will automatically be updated on the map canvas.
-* copy part or all of the current style, and when applicable, paste a copied
-  style from another layer
-* :guilabel:`Rename current...` style
-* :guilabel:`Add` a new style (which is actually a copy of the current one)
-* or :guilabel:`Remove current` style (only when multiple styles are available).
+From this menu you can:
+
+* see the :ref:`styles <manage_custom_style>` currently available for the layer
+  and switch between them. When you select another style, the layer rendering
+  is automatically updated on the map canvas.
+* copy part or all of the current style and, when applicable, paste a copied
+  style from another layer.
 
   .. tip:: **Quickly share a layer style**
 
@@ -1368,7 +1371,7 @@ Manage styles from layer context menu
 ---------------------------------------
 
 Right-click on the layer in the :guilabel:`Layers` panel and select :guilabel:`Styles`
-to copy, paste, add, remove or rename layer styles.
+to copy, paste, add, remove, rename, load or save layer styles.
 
 * :guilabel:`Copy Current Style`: copies all the settings of the active style to the clipboard.
 
@@ -1388,6 +1391,20 @@ to copy, paste, add, remove or rename layer styles.
   to apply the copied styles.
   Saved styles are listed in the layer context menu, allowing quick switching between them.
 
+* :guilabel:`Add...`: creates a new style based on the current one.
+
+* :guilabel:`Remove Current`: removes the currently active style
+  (available only when multiple styles exist).
+
+* :guilabel:`Rename Current...`: renames the currently active style.
+
+* :guilabel:`Load Style...`: loads a style from an external style file
+  and applies it to the layer.
+
+* :guilabel:`Save Style...`: saves the current layer style to an
+  external style file for reuse.
+
+
 .. _store_style:
 
 Storing Styles in a File or a Database